Detachable cover system

1. A detachable cover system, comprising:

an enclosure having an opening;

a cover for covering said opening;

a first magnetic structure attached to said enclosure;

a second magnetic structure attached to said cover, one of said first magnetic structure or said second magnetic structure comprising a plurality of magnetic sources comprising a first magnetic source having a first polarity and a second magnetic source having a second polarity opposite said first polarity, said first magnetic structure and said second magnetic structure being configured in a first relative alignment position and having a composite magnetic field that produces a composite attract force that causes said first magnetic structure and said second magnetic structure to magnetically attach such that said cover covers said opening;

a coil located in proximity to one of said first magnetic structure or said second magnetic structure, said coil being controllable to produce a bias magnetic field that is added to the composite magnetic field while said first magnetic structure and said second magnetic structure are in said first relative alignment position, said adding of the bias magnetic field to the composite magnetic field causing said first magnetic structure and said magnetic structure to produce a repel force that causes magnetic detachment of said first magnetic structure from said second magnetic structure such that said cover no longer covers said opening; and

said first magnetic structure and said second magnetic structure are a multi-level magnetic system that produces forces that transition from a net attract force to a net repel force at a transition distance.

2. The detachable cover system of claim 1 , further comprising:

a power source for providing electricity to said coil.

3. The detachable cover system of claim 1 , further comprising:

a hinge attached to said enclosure and to said cover, said hinge constraining movement of said first magnetic structure relative to said second magnetic structure.

4. The detachable system of claim 1 , further comprising:

a spacer that prevents said first magnetic structure from being closer to said second magnetic structure than a spacer contact distance.

5. The detachable system of claim 1 , wherein said first magnetic structure and said second magnetic structure magnetically attach but do not touch.

6. The detachable system of claim 1 , further comprising:

a modulating element for increasing or decreasing said transition distance of said multi-level magnetic system.

7. The detachable cover system of claim 1 , wherein said plurality of magnetic sources comprise at least one of permanent magnet sources, electromagnets, and electro-permanent magnets.

8. The detachable cover system of claim 1 , further comprising:

a movement constraining structure for constraining movement of at least one of said first magnetic structure or said second magnetic structure.

9. The detachable cover system of claim 8 , wherein said movement constraining structure only allows relative movement of the first magnetic structure to or away from said second magnetic structure where the first and magnetic structure are substantially parallel to each other.

10. The detachable cover system of claim 8 , wherein said movement constraining structure prevents rotation of the first magnetic structure relative to the second magnetic structure.

11. The detachable cover system of claim 8 , where said movement constraining structure has variable states whereby relative movement of said first magnetic structure to said second magnetic structure is constrained in a first way while said movement constraining structure is in a first state but said relative movement of said first magnetic structure to said second magnetic structure is one of not constrained or constrained in a second way while said movement constraining structure is in a second state.

12. The detachable system of claim 11 , wherein said movement constraining structure prevents rotation of said first magnetic structure and said second magnetic structure while in said first state and allows rotation of at least one of said first magnetic structure and said second magnetic structure while in a second state.

13. The detachable system of claim 1 , wherein said plurality of magnetic sources comprises an outer portion and an inner portion.

14. The detachable system of claim 1 , wherein one of said first magnetic structure or said second magnetic structure is a conventional magnet.

15. The detachable system of claim 1 , further comprising:

a control system for controlling said coil.

16. A detachable cover system, comprising:

an enclosure having an opening;

a cover for covering said opening;

a first magnetic structure attached to said enclosure;

a second magnetic structure attached to said cover, one of said first magnetic structure or said second magnetic structure comprising a plurality of magnetic sources comprising a first magnetic source having a first polarity and a second magnetic source having a second polarity opposite said first polarity, said first magnetic structure and said second magnetic structure being configured to magnetically attach such that said cover covers said opening;

a spacer that prevents said first magnetic structure from being closer to said second magnetic structure than a spacer contact distance; and

a coil located in proximity to one of said first magnetic structure or said second magnetic structure, said coil being controllable to produce a magnetic field that causes magnetic detachment of said first magnetic structure from said second magnetic structure such that said cover no longer covers said opening, wherein said first magnetic structure and said second magnetic structure are a multi-level magnetic system that produces forces that transition from a net attract force to a net repel force at a transition distance, wherein said spacer contact distance is between said transition point and a separation distance between said first and second magnetic structures where a peak repel force is produced by said multi-level magnetic system.

17. A detachable cover system, comprising:

an enclosure having an opening;

a cover for covering said opening;

a first magnetic structure attached to said enclosure;

a second magnetic structure attached to said cover, one of said first magnetic structure or said second magnetic structure comprising a plurality of magnetic sources comprising a first magnetic source having a first polarity and a second magnetic source having a second polarity opposite said first polarity, said first magnetic structure and said second magnetic structure being configured to magnetically attach such that said cover covers said opening; and

a coil located in proximity to one of said first magnetic structure or said second magnetic structure, said coil being controllable to produce a magnetic field that causes magnetic detachment of said first magnetic structure from said second magnetic structure such that said cover no longer covers said opening, wherein said plurality of magnetic sources comprises an outer portion and an inner portion, wherein said outer portion is an annular ring and said inner portion is a circular area surrounded by said annular ring.

18. A detachable cover system, comprising:

an enclosure having an opening;

a cover for covering said opening;

a first magnetic structure attached to said enclosure;

a second magnetic structure attached to said cover, one of said first magnetic structure or said second magnetic structure comprising a plurality of magnetic sources comprising a first magnetic source having a first polarity and a second magnetic source having a second polarity opposite said first polarity, said first magnetic structure and said second magnetic structure being configured to magnetically attach such that said cover covers said opening; and

a coil located in proximity to one of said first magnetic structure or said second magnetic structure, said coil being controllable to produce a magnetic field that causes magnetic detachment of said first magnetic structure from said second magnetic structure such that said cover no longer covers said opening, wherein said plurality of magnetic sources comprises an outer portion and an inner portion, wherein said outer portion is of a single plurality and said inner portion comprises an ensemble of coded magnetic sources.

19. A detachable cover system, comprising:

an enclosure having an opening;

a cover for covering said opening;

a first magnetic structure attached to said enclosure;

a second magnetic structure attached to said cover, one of said first magnetic structure or said second magnetic structure comprising a plurality of magnetic sources comprising a first magnetic source having a first polarity and a second magnetic source having a second polarity opposite said first polarity, said first magnetic structure and said second magnetic structure being configured to magnetically attach such that said cover covers said opening; and

a coil located in proximity to one of said first magnetic structure or said second magnetic structure, said coil being controllable to produce a magnetic field that causes magnetic detachment of said first magnetic structure from said second magnetic structure such that said cover no longer covers said opening, wherein said plurality of magnetic sources comprises an outer portion and an inner portion, wherein said outer portion comprises a plurality of magnetic sources and said inner portion is of a single polarity.